參數(shù)資料
型號: HD4074339S
廠商: Hitachi,Ltd.
英文描述: 4-bit HMCS400-Series microcomputer with large-capacity memory
中文描述: 4位HMCS400系列的大容量存儲器微機
文件頁數(shù): 15/78頁
文件大?。?/td> 337K
代理商: HD4074339S
HD404339 Series
15
ROM Addressing Modes
Direct Addressing Mode:
A program can branch to any address in ROM memory space by executing the
JMPL, BRL, or CALL instruction.
Current Page Addressing Mode:
A program can branch to any address in the current page (256 words
per page) by executing the BR instruction.
Zero-Page Addressing Mode:
A program can branch to any subroutine located in the zero-page
subroutine area ($0000–$003F) by executing the CAL instruction.
Table Data Addressing Mode:
A program can branch to an address determined by the contents of 4-bit
immediate data, the accumulator, and the B register by executing the TBR instruction.
0
0
Direct Addressing
2nd
instruction word
Program counter
Current Page Addressing
9
7
0
9
Program counter
1st
instruction word
5
0
Zero-Page Addressing
0 0
Operand
0
9
Table Data Addressing
7
13
0
9
Operand
Opcode
3
0
13
Operand
* * * * * *
Opcode
Program counter
0
13
3
Operand
Opcode
B
A
0
9
Opcode
0 0 0 0 0 0 0 0
Program counter
0
13
Figure 8 ROM Addressing Modes
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